USPTO Patents Application 09870801

(19)

JAPANESE PATENT OFFICE

PATENT ABSTRACTS OF JAPAN

(11) Publication number: 05173892 A

(43) Date of publication of application: 13.07.93

(51) InL 01

G06F 12/14
G06F 9/445
GOGF 9/06
G06F 12/14

(21) Application number: 03345124

(22) Date of filing: 26.12.91

(71) Applicant:

(72) Inventor:

NEC CORP

KOMATSU HIROYOSHI

(54) FILE LOADING SYSTEM

(57) Abstract:

PURPOSE: To obtain a file loading system where the
alternation of the load module file of an execution type
and the illegal operation of a computer are prevented.

CONSTITUTION: A first logical operation processing is
executed in a file 20 which is obtained by ciphering the
load module file 10 so as to generate a check digit, the
check digit is added to a ciphering file 20 so as to
form a ciphering file 30 with the check digit and it is
inputted to the computer. The computer executes the
second operation processing by the same rule as the
first logical operation to the inputted file 30,
compares the operation result with the check digit,
refuses a loading when both does not coincide and
decodes a ciphering file part so as to execute the
loading when they coincide.

COPYRIGHT: (C)1993,JPO&Japio

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